Lamp.



No. 710,064. Pafented se t. 30, I902. -T. J. LITLE, 1n.

' LAMP.

(Application filed Jan. 81, 1900. Renewed Feb. 4, 1901.)

(No Model.) 2 Sheets-Shaat I.

Vi JVv C/ Tn: NORRIS Pmns ca. PHOTO-LITHQ. WASMINGTON. o, c.

- No. 7|0,0s4.

Patented Sept, 30, I902."

T. a. LITLE; m.

LAMP.

(Application filed Jan. 81, 1900. Repewed Feb. 4, 1901.)

2 Sheets-Sheat 2,

(No Model.)

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UNITED STATES PATENT OFFICE.

THOMAS J. LITLE, JR, OE CLEVELAND, OHIO, ASSIGNOR TO THE NEW PROCESSLIGHTING COMPANY, OE CLEVELAND, OHIO, A CORPORA- TION OF OHIO.

(LAM P.

SPECIFICATION forming part of Letters Patent N 0. 710,064, datedSeptember 30, 1902.

Application filed January 31, 1900. Renewed I-ebruary 4, 1901. SerialNo. 45,986. (No model.)

To all? whom it may concern:

Be it known that I, THOMAS J. LITLE, Jr.,' of Cleveland, Cuyahogacounty, Ohio, formerly of Philadelphia, Pennsylvania, have invented acertain new and useful Improvement in Lamps, of which the following is afull, clear, and exact description, reference being had to theaccompanying drawings.

The object of this invention is to provide a gas-lamp withself-contained and efficient means for increasing the light-giving powerof its burner. I accomplish this by'providing a caloric-engine driven bythe heat from the burner, and I use the mechanical energy of this engineto compress the gas-supply and then let that supply escape ina jet tothe burner, taking with it an augmented supply of air. I use the termcaloric-engine herein in contradistinction toan apparatus driven by thedraftgenerated by the heat of the lamp, for such apparatuses do notpossess sufficient power to produce my operation. The caloric-engine issupported so that it is driven by the waste heat from the burner, and itoperates to compress the gas into a' suitable reservoir, from whence itpasses in a jet governed by a suitable cock into a pipe having externalopenings, whereby it draws air in with it and produces, in effect, aBunsen burner giving an intense heat to suitablyheld incandesciblematerial, preferably a Welsbach mantle or mantles, which therebyfurnishes the light. e

Myinvention consists of such an apparatus broadly and more or lessspecifically, as hereinafter described, and set out in the claims.

My copendingapplicati0n,Serial No. 26,039, filed August 6, 1900,foralamp covers,broadly, the combination of a heating-burner andincandescible material associated therewith, a caloric-engine operatedby the heat of the burner, and means operated by the caloricengine foraugmenting the supply of air or other combustion-supporter to theburner, and that application dominates this case. The present inventionrelates to a lamp structure wherein theaugmenting means consists of anescaping jet of compressed fuel-gas after the manner of a Bunsen burner.

The drawings sufficiently illustrate the invention.

well-known type. pansion cylinder e thereof extends below the Figure lis a front elevation, partly sectional, of my apparatus; Fig. 2, an endelevation, partly broken away; and Fig. 3,avertical cross-section of thereservoir and its nozzle and the burner-tube.

Referring. to the parts by letters, a. represents the burner, abovewhich are mounted incandescing mantles I). From the burner extends thefeed-tube 0,, which, as shown, is open at its upper end. The gas, ashereinafter explained, discharges in a jet into this open end, and thuscarries air with it, increasing the supply to the burner, whereby theburner becomes really a Bunsen burner.

Above the burner is the caloric-engine. As shown in the drawings, thereis provided a heat-insulating diaphragm above the burner, consisting ofaplated, supporting a layer (1 of heat-insulating material, as abestos,and supported by this plate also is a frame or bracket 01 which carriesthe bed plate or support of the caloric-engine. This engine is of anyThe contraction and exbracket 61- and partly below the diaphragm,s0 asto expose the lower or expanding portion 6 to the heat from the burner.At the side of the cylinder 6 is arranged the cooling-cylinder m, whichis traversed by a piston, the rod m of which takes on a crank-shaft 6The lower end of the cylinder m is connected with the upper end of thecylinder 6', and in this latter cylinder is a loose displacer connectedby a rod with the crank-shaft 6 Thus a caloric-engine is provided.

As is well understood, the air in the cylin- I der 6' becoming heatedand expanding creates a pressure therein, which acting around the loosedisplacer will force upward the piston in the cylinder m. This willbring down thedisplacer, which will bodily transfer the air in the lowerend of the cylinder 6 to its upper end and into the cylinder m, where itwill contract from the coolness of this upper end and of the cylinder m,allowing the piston in the latter to descend. Thecrank-shaft c of theengine has a crank-arm e connected to the piston f, which reciprocatesinthe pumpcylinderf". The base of the cylinder f is controlled by a springcheck or ball valve. The port f leads into the valve-casingf' from thepipe which is a branch from the main gas-pipe. The port f leads from thevalvecasingofa chamberflwhich discharges into a pipeh',communicatingwithareservoiror tank h. These two valves and the pistonand cylinderoperate as a pump, drawing in gas from the main anddischarging it under pressure into the tank or reservoir. Avalve-controlled discharge-pipe 7Z2 enters the burner-tube 61-preferably at its open end. When this valve is opened, the gas issuesfrom the nozzle If in the form of a jet, drawing in air through theopening in the burner-tube, thus making a Bunsen burner, as is wellunderstood. From the reservoir 71 there also leads a pipe 77. whichdischarges into the gas-pipe g, but is provided with a springcontrolledvalve h, normally closing such discharge, but adapted to be open whenthe pressure in the reservoir is greater than that of the spring. Thusthe valve 7L not only provides asafety-valve, but provides a governorfor regulating the pressure of the gas in the tank by varying the forceof the spring employed.

The operation of the apparatus is as follows: The heat from the burneroperates the motor to rotate the crank-shaft which drives the pump tocompress gas into the reservoir. The gas under pressure will dischargeinto the burner-tube in the form of a jet, and thus it draws throughsuch tube the proper quantity of air to cause the gas to burn with thebest results. Now it is desirable to cause the motor to operatesufficiently to properly compress the gas before the regular burner isignited. To accomplish this, a branch pipe g leads from the maingas-pipe g and is provided with a cock, as 9 and a burner y, lo catedadjacent to the expanding-cylinder of the motor. A continuously-burningpilotfiarne through a small tube 9 serves to ignite the gas issuing fromthe burner g when the valve is opened. The gas to the pump being turnedon at the main cock 9 and the supplyto the heating-burnerbeingalsoturned on at its cock g this burner will speedily heat the cylinder ofthe motor to cause it to operate to charge up the reservoir, after whichthe heating-burner g is dispensed with, the gas being turned 0% at thecook 9 and then the cock in the nozzle 7L2 is turned to admit thecompressed gas into the burner-tube a as desired, and this gas rushingin draws air around it, constituting the burner A a Bunsen burner, whichgives an intense heat and a correspondingly intense light to themantles.

I claim- 1. In a lamp, in combination, an incandescible material, aheating-burner associated therewith, a caloric-engine operated by theheat thereof, means operated by the caloricengine for compressing a gas,means for causing such compressed gas to escape in a jet, and apassage-way leading from said jet to the burner and adapted to conveythe gas and air thereto' 2. In a lamp, the combination of a Bunsenburner, a caloric-engine operated by the heat from said burner, meansdriven by said engine for compressing the fuel supplied to said burner,and an incandescible material adapted to be rendered luminous by saidburner.

3. In a lamp, in'combination, an incandescible material, aheating-burner associated therewith, a gas-supply pipe, a caloric-engineoperated by the heat of said burner, means operated by said engine forcompressing the gas from the supply-pipe, means for causing suchcompressed gas to escape in a jet and carry air with it to the burner,and a lampframe carrying all of said parts.

4. In a lamp, in combination, a gas-supply pipe, acaloric-engine andmeansdriven thereby for compressing the gas from such pipe, said enginebeing operated by the heat generated by burning gas from such pipe, anincandescihle material, and a heating-burner associated therewith, andmeans for causing the compressed gas to escape in ajet thereto and takecombustion-supporter with it.

5. In a lamp, in combination, an incandescing mantle, and aheating-burner associated therewith, a reservoir, a caloric-engineoperated by the heat of the burner, and means driven by said engine forcompressing gas in the reservoir, and means for conveying such gas tothe burner.

6. In a lamp,in combination, an incandescible material, a heating-burnerassociated therewith, a reservoir, a gas-supply pipe, a caloric-engineoperated by the heat of said burner, and means driven by said engine forcompressing in the reservoir gas from the supply-pipe, and means forcausing the gas to escape from the reservoir in a jet and carry air withit to the burner.

7. In a lamp, in combination, a reservoir, a gas-supply pipe, acaloric-engine operated by the heat of the burner, means driven by saidengine for compressing gas from the supply-pipe in the reservoir, anincandescing mantle, a burner, a burner -pipe leading thereto and havingan air-opening, and a discharge-pipe from said reservoir into saidburner-pipe.

8. In a lamp, in combination, an incandescible material, aheating-burner associated therewith, a conduit leading to said burnerand having an opening to the outer air, a reservoir, a gas-supply pipe,a caloric-engine operated by the heat of the burner, means driven bysaid engine for forcing gas from the supply-pipe into the reservoirunder pressure, an exit-pipe leading from said reservoir and discharginginto said conduit, and a cock for governing said exit-pipe.

9. In a lamp, in combination, a caloric-engine, a main burner and aninitial heatingburner for the same, an incandescible material associatedwith said main burner, means operated by said engine for compressinggas,

means for feeding compressed gas with air to said main burner, and meansfor feeding the 10. In a lamp, in combination, an incandes cing mantle,a heating-burner associated therewith, a reservoir, a caloric-engineoperated by the heat of the burner, means driven thereby for compressinggas in the reservoir, means for conveying the gas from the reservoir tothe burner, and a governor limiting the pressure in the reservoir.

11. In a lamp, in combination, an incandescible material, aheating-burner associated therewith, a reservoir, means operated by theheat of the burner for compressing gas in the reservoir, means forconveying such gas to the burner, and a return-pipe leading from thereservoir to the gas-supply, and a springvalve for controlling saidreturn-pipe.

12. In a lamp, in combination, a reservoir, a gas-supply pipe, acaloric-engine and means driven thereby for compressing gas from thesupply-pipe into the reservoir, an incandescible material, a burnertherefor, aburnerpipe leading thereto and having an air-opening, adischargepipe from said reservoir into said burner-pipe, and asuspensible frame carrying all of said parts.

13. In a lamp, in combination, an incandescible material,aheating-Burnerassociated therewith, a caloric-engine adapted to be operated by theheat thereof, a pump driven by said engine, a reservoir into which saidpump discharges, a supply-pipe adapted to convey gas to said pump,whereby the engine may compress the gas in the reservoir, adischargepipeleading from said reservoir, and a pipe having an air-opening forconveying such discharge and air to the burner.

14. In a lamp, in combination, an incandescible material, aheating-burner associated therewith, a caloric-engine operated by theheat thereof, a pump driven by said engine, a reservoir into which saidpump discharges, a supply-pipe adapted to convey gas to said pumpwhereby the engine may compress the gas in the reservoir, adischarge-pipe leading from said reservoir, a pipe for conveying suchdischarge and air to the burner, a return-pipe leading from thereservoir to the fuel-suppiy, a spring-valve for governing the same, andcooks in the supply-pipe and discharge-pipe respectively.

15. In a lamp, the combination with an incandescible material, aheating-burner associated therewith, a caloric-engine which converts aportion of the waste heat from said burner into rotary mechanicalmovement, mechanism operated by such rotary movement for compressing thegas, and means for causing such compressed gas to escape in a jet tosaid burner whereby it may take air with it. i

16. In a lamp, in combination, an incandescible material, a burnertherefor, a burnerpipe leading to the burner and having an opening forthe reception of air, a caloric-engine above the incandescible material,a heatdiaphragm across the engine for maintaining the upper portionthereof cool, a pump operated by said engine, a gas-supply pipe leadingthereto, a reservoir into which said pump is adapted to discharge, and adischarge-pipe from said reservoir to said burner-pipe.

17. In a lamp, in combination, a caloric-engine, a main burner, and aninitial-heating burner for the same, an incandescible materialassociated with said main burner, a reservoir, a pump operated by saidengine for compressing gas from the supply into said reservoir, aburner-pipe leading to said main burner, a jet-pipe from the reservoirdischarging into said burner-pipe, and two gassupply pipes branchingfrom a common pipe and one leading to said pump and the other to saidinitial-heating burner.

In testimony whereof I have hereunto set my signature in the presence oftwo subscribing witnesses.

THOS. J. LITLE, JR.

Witnesses:

J. WALTER DOUGLASS, THOMAS M. SMITH.

